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    embender's Avatar
    embender Posts: 1, Reputation: 1
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    #1

    Nov 30, 2011, 08:31 PM
    Trigonometric identity solver?
    2*(sin^(6)θ cos^(6)θ)-3*(sin^(4)θ cos^(4)θ) 1=0
    need to verify this identity
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Dec 1, 2011, 07:43 AM
    Please be aware that you can't copy and paste special characters such as (theta) into this web site, or it ends up looking like gibberish. Please type the equation out, or use the Latex facility. However, I think this may be what you mean:



    If you replace with and replace with and then do the algebra, it falls right out.
    Georgia_girl06's Avatar
    Georgia_girl06 Posts: 2, Reputation: 1
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    #3

    Feb 20, 2012, 10:35 AM
    Cos^2(2u)-sin^2(2u)
    Georgia_girl06's Avatar
    Georgia_girl06 Posts: 2, Reputation: 1
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    #4

    Feb 20, 2012, 10:36 AM
    cos(4u)=cos^2(2u)-sin^2(2u)
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